# Christmas Light Webquest

## EXPERIMENT ONE

Question: How does the type of circuit affect the strand of Christmas lights with a burned out bulb?

Independent variable: Type of circuit

Dependent variable: Number of bulbs lit after one bust

Hypothesis: If the Christmas lights are arranged in a parallel circuit then when 1 bulb bursts the other bulbs will light up.

## OBSERVATIONS

When all three bulbs are in a parallel circuit all the bulbs are lit up at the same time.

## OBSERVATIONS WHEN A BULB BUST

After a bulb bust all the other lights stay lit.

## EXPERIMENT TWO

Hypothesis: If the Christmas lights are arranged in a series circuit then when 1 bulb bursts the other bulbs will not light up.

## OBSERVATIONS

All the lights are lit.

## OBSERVATIONS WHEN A BULB BURST

When a bulb burst all the other lights shut off.

## CONCLUSION

A parallel circuit is the best series to use for Christmas lights because when a bulb burst the other lights stay lit. A series circuit is best because there is more than one path for the electricity to flow. When a bulb bust in the parallel circuit the other bulbs stayed lit while when a bulb bust in a series circuit all the other bulbs went out. In conclusion a parallel circuit is the best circuit for a string of Christmas lights.